S&C Micro-AT, Installation, Programming, And Operation Manual

Page: 18 / 42

18 S&C Instruction Sheet 515-600
Features
The display is indicating the access code must be entered before the value of loss-
of-source voltage can be changed. As each digit of the access-code number is pressed,
the display indicates that digit. When all the digits have been pressed—followed by the
ENTER key—the display changes to:
VOLTS: LOSS OF SOURCE
8 5 .0 VOLTS
The desired value of loss-of-source voltage can be entered at this time. If a value of 102
Volts were desired, the “1,” “0,” and “2” keys would be pressed—followed by the ENTER
key. The display changes to:
VOLTS: LOSS OF SOURCE
102 VOLTS CHANGE
Other items in the Voltage menu are accessed by use of the NEXT item key (or LAST
item key) and changed, if necessary, in the same manner. The access code need not be
reentered. When no further items are to be accessed in the
Voltage menu, the NEXT key
should be pressed and then the QUIT key should be pressed.
Items in other menus are similarly accessed by pressing the appropriate menu key,
followed by the NEXT item key (or LAST item key) and exited gracefully by pressing
the QUIT key. Following completion of the changes to the various settings, the manual/
automatic operation selector switch placed in
Automatic mode.
DATE TIME
PRESS ANY MENU KEY
Incidentally, the display will also revert to its normal appearance if no keystrokes of
the keypad have been detected for 5 minutes. Should this occur, the access code will
need to be reentered before the value of an item can be changed.
If an invalid access code is entered in the course of chang ing the value of an item, an
Error message will be dis played for 5 seconds. For the example given above, this display
would appear as follows:
VOLTS: LOSS OF SOURCE
INVALID ACCESS CODE
If an unacceptable value (one not within the specified range) is entered in the course
of changing the value of an item, another
Error
message will be displayed for 5 sec onds.
For the example given above, this display would appear as follows:
ENTRY MUST BE BE TWEEN
80.0 AND 105 VOLTS
Error Messages